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kvm.go
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kvm.go
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// Copyright 2014 The rkt Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//+build linux
package main
import (
"fmt"
"path/filepath"
"github.com/coreos/rkt/Godeps/_workspace/src/github.com/appc/spec/schema/types"
"github.com/coreos/rkt/common"
"github.com/coreos/rkt/networking"
stage1commontypes "github.com/coreos/rkt/stage1/common/types"
stage1initcommon "github.com/coreos/rkt/stage1/init/common"
"github.com/coreos/rkt/stage1/init/kvm"
)
// KvmPodToSystemd generates systemd unit files for a pod according to the manifest and network configuration
func KvmPodToSystemd(p *stage1commontypes.Pod, n *networking.Networking) error {
podRoot := common.Stage1RootfsPath(p.Root)
// networking
netDescriptions := kvm.GetNetworkDescriptions(n)
if err := kvm.GenerateNetworkInterfaceUnits(filepath.Join(podRoot, stage1initcommon.UnitsDir), netDescriptions); err != nil {
return fmt.Errorf("failed to transform networking to units: %v", err)
}
// volumes
// prepare all applications names to become dependency for mount units
// all host-shared folder has to become available before applications starts
appNames := []types.ACName{}
for _, runtimeApp := range p.Manifest.Apps {
appNames = append(appNames, runtimeApp.Name)
}
// mount host volumes through some remote file system e.g. 9p to /mnt/volumeName location
// order is important here: PodToSystemHostMountUnits prepares folders that are checked by each appToSystemdMountUnits later
if err := stage1initcommon.PodToSystemdHostMountUnits(podRoot, p.Manifest.Volumes, appNames, stage1initcommon.UnitsDir); err != nil {
return fmt.Errorf("failed to transform pod volumes into mount units: %v", err)
}
return nil
}